Add audeer.move()

[hagenw]

Closes #98
Closes #96

Add audeer.move() as a replacement for audeer.move_file()
as audeer.move_file() does also support moving folders.
So it makes sense to update its docstring accordingly and also reflect it in the name.
As backward compatibility is a very important aspect of audeer, we do not remove audeer.move_file(), but just add a statement that in the docs that audeer.move() should be used.

[codecov]

Codecov Report

Merging #128 (29a82f5) into main (ef3b271) will not change coverage.
The diff coverage is 100.0%.

Additional details and impacted files

Files	Coverage Δ
audeer/__init__.py	100.0% <100.0%> (ø)
audeer/core/io.py	100.0% <100.0%> (ø)

[audeerington]

Nice, I agree the new function name makes more sense now.